CN114199055B - Sheet metal element having a cured composite structure and method for producing the same - Google Patents
Sheet metal element having a cured composite structure and method for producing the same Download PDFInfo
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- CN114199055B CN114199055B CN202010882802.5A CN202010882802A CN114199055B CN 114199055 B CN114199055 B CN 114199055B CN 202010882802 A CN202010882802 A CN 202010882802A CN 114199055 B CN114199055 B CN 114199055B
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- 239000002184 metal Substances 0.000 title claims abstract description 107
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 107
- 239000002131 composite material Substances 0.000 title claims abstract description 78
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 41
- 239000002923 metal particle Substances 0.000 claims abstract description 66
- 229920000642 polymer Polymers 0.000 claims abstract description 58
- 239000000843 powder Substances 0.000 claims abstract description 44
- 239000002245 particle Substances 0.000 claims description 76
- 239000010949 copper Substances 0.000 claims description 49
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 48
- 229910052802 copper Inorganic materials 0.000 claims description 43
- 229910044991 metal oxide Inorganic materials 0.000 claims description 41
- 150000004706 metal oxides Chemical class 0.000 claims description 41
- 239000002002 slurry Substances 0.000 claims description 38
- 239000000758 substrate Substances 0.000 claims description 31
- 238000005245 sintering Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 16
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 claims description 14
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 claims description 14
- 229940112669 cuprous oxide Drugs 0.000 claims description 14
- 239000003960 organic solvent Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 239000001257 hydrogen Substances 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 9
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 7
- 239000005751 Copper oxide Substances 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 229910000431 copper oxide Inorganic materials 0.000 claims description 6
- 238000005336 cracking Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000012209 synthetic fiber Substances 0.000 claims description 6
- 229920002994 synthetic fiber Polymers 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
Abstract
The invention relates to a sheet metal element with a solidified composite material structure and a manufacturing method thereof. The solidified composite material structure is adhered in the groove structure and comprises metal powder and polymer. The metal powder comprises a plurality of metal particles; the cured polymer coats and is interspersed between the metal particles. Wherein the metal particles and the polymer of the cured composite material adhere to each other to form a continuous structure. Therefore, the sheet metal element can form semi-finished products with stable properties for manufacturing the temperature equalization plate element and the capillary structure thereof, is favorable for transportation and inventory management, simplifies the flow for manufacturing the temperature equalization plate element, and improves the efficiency of mass production.
Description
Technical Field
The present invention relates to a sheet metal element for further processing to form a temperature equalization plate element and a capillary structure thereof, and more particularly, to a sheet metal element which is thermally cracked and sintered to form a porous capillary structure, and is used for sealing with another sheet metal element and processing to form a temperature equalization plate element, and more particularly, to a sheet metal element having a cured composite structure and a method for manufacturing the same.
Background
In a conventional method for manufacturing a thin vapor chamber (vapor chamber), after etching grooves on a sheet copper substrate, a copper powder mesh is laid on the copper substrate, pressed by a graphite jig and sintered at high temperature to form a capillary structure on the surface of the grooves of the copper substrate, and then the copper substrate with the capillary structure is welded with another sheet copper substrate in a groove-like manner to form an air passage cavity. Further processing by water injection, vacuum pumping, sealing and the like to manufacture the thin type temperature equalizing plate with the capillary structure.
The capillary structure of Xi Zhijun temperature plate has four types, namely Groove (Fiber), copper Mesh (Mesh) and Sintered copper Powder (Sintered Powder), according to the thickness of the element and the heat-relieving power, wherein the capillary force of the Sintered copper Powder (Sintered Powder) is optimal and is not influenced by gravity. However, in the case of super-uniform temperature plate (Vapor Chamber), the thickness of the element and the depth of the groove are too small, so that a capillary structure sintered by laying copper powder is difficult to manufacture, and a copper Mesh (Mesh) is the main stream. However, the copper Mesh (Mesh) is paved in the ultra-thin temperature-uniforming plate with the thickness of the element being less than 0.3mm, the working procedure is quite complicated and difficult, the automatic mass production is not easy, the capillary force of the copper Mesh is also poor, and the high-efficiency temperature-uniforming plate element is difficult to manufacture.
Therefore, how to simplify the complicated process, so that the process of manufacturing the ultra-thin temperature-equalizing plate capillary structure can accord with mass production and automatic operation is a problem which is attempted to be solved by the person skilled in the art as much as possible.
Disclosure of Invention
The inventors contemplate a method of manufacturing a capillary structure with a printing paste. The periphery of the metal particles in the slurry is coated with the polymer. When the polymer is heated and cracked, and the metal particles are sintered at high temperature, the metal particles are bonded to each other to form a porous capillary structure. The method can effectively mass-produce the capillary structure of the temperature-equalizing plate with extremely thin thickness, and has better capillary water absorption capacity than the conventional copper mesh capillary structure under proper conditions, thereby improving the heat conduction and heat absorption efficiency of the ultra-thin temperature-equalizing plate element. However, the slurry itself contains a volatile chemical solvent and has rheological properties, and when the slurry is left for a long time, the viscosity of the slurry is changed due to the volatilization of the solvent, so that the rheological properties of the slurry are changed. In addition, the slurry contains metal powder, so that deterioration and precipitation are also generated. Therefore, when the slurry is used to manufacture the capillary structure of the temperature equalization plate element, the variation control on the viscosity and the rheological property of the slurry becomes a variable for manufacturing the high-quality capillary structure of the temperature equalization plate element.
In view of the above, the present invention is directed to a sheet metal element having a cured composite structure and a method for manufacturing the same. The semi-finished product of the capillary structure can be directly pre-cast in the groove of the metal sheet and supplied to a production factory for manufacturing the temperature-equalizing plate element, so that the manufacturer for manufacturing the temperature-equalizing plate element can easily reprocess the metal sheet, and the capillary structure is formed through the heating cracking and sintering processes, thereby saving various troubles and variables of printing by using rheological slurry. The present invention forms a cured composite structure in the trench structure of the metal sheet, such that the polymer is interspersed between the metal particles, thereby forming the cured composite structure. The polymer in the cured composite structure has certain viscosity, and the dispersed metal particles are coated by the polymer. And the integral structure is attached to the sheet metal element, so that the sheet metal element is fixed and does not flow, and is convenient to transport and store, and the sheet metal element is a precast material sheet for manufacturing the temperature equalizing plate element and the capillary structure thereof.
In order to achieve the above object, the present invention discloses a sheet metal element having a cured composite structure, which is used for manufacturing a temperature equalization plate element and a capillary structure thereof, and is characterized by comprising:
a sheet metal substrate having a first surface with a trench structure; and
a cured composite structure, attached within the trench structure, further comprising:
a metal powder comprising a plurality of metal particles;
a polymer dispersed among the metal particles and coating at least a part of the surfaces of the metal particles;
wherein the metal particles and the polymers of the cured composite material adhere to each other to form a continuous structure.
Wherein: the polymer is used for cracking and removing when heating to form gaps among the metal particles, and the metal powder is used for forming a porous capillary structure when sintering.
Wherein: the metal particles include at least one of a plurality of copper particles and a plurality of copper alloy particles.
Wherein: further comprising a metal oxide powder comprising a plurality of metal oxide particles interspersed between the metal particles.
Wherein: the metal oxide particles include at least one of a plurality of copper oxide particles and a plurality of cuprous oxide particles.
Wherein: the cuprous oxide powder is an octagonal cubic crystal having an average particle diameter (D50) of less than 5 μm.
Wherein: the polymers comprise a plurality of plastic polymer materials and a plurality of synthetic fiber materials.
Wherein: the plastic polymer materials are polymethyl methacrylate materials, and the synthetic fiber materials are polyamide fiber materials.
Also disclosed is a method of making a sheet metal element having a cured composite structure, characterized by comprising the steps of:
providing a sheet metal substrate with a groove structure;
providing a slurry, wherein the slurry is mixed with a metal powder, a metal oxide powder, a polymer and an organic solvent;
laying the slurry in the groove structure;
heating and baking the slurry to volatilize the organic solvent, and curing the metal powder, the metal oxide powder and the polymer to form a cured composite structure which is adhered in the groove structure of the sheet metal substrate.
Wherein: the polymer powder is used for cracking and removing when heating, so that gaps are formed between the particles of the metal powder and the particles of the metal oxide powder, and the metal powder and the metal oxide powder form a porous capillary structure after sintering under the atmosphere containing hydrogen.
In summary, the present invention provides a sheet metal element having a cured composite structure and a method of making the same, wherein the polymer protects the metal particles and connects the metal particles to each other, and the cured composite structure is attached to the sheet metal element to prevent flow. When the device is used for further processing and manufacturing, the device can be effectively transported and stored for batch mass production, so that automatic operation can be achieved, and the production efficiency is improved. And the polymer on the sheet metal element can be easily burned off in the subsequent process sintering. And porous capillary structures are formed by sintering of the metal powder particles with the voids left by thermally cracking the polymer.
Drawings
Fig. 1A: a schematic view of a sheet metal substrate according to an embodiment of the present invention is shown.
Fig. 1B: a schematic diagram of a sheet metal element having a cured composite structure according to an embodiment of the present invention is shown.
Fig. 1C: an enlarged schematic diagram of region a in the embodiment according to fig. 1B is shown.
Fig. 2: a cross-sectional view of a cured composite structure according to another embodiment of the invention is shown.
Fig. 3: a schematic diagram of a cured composite structure according to the embodiment of fig. 2 after sintering is shown.
Fig. 4: a flow chart of steps of a method for fabricating a sheet metal component having a cured composite structure according to an embodiment of the invention is shown.
Fig. 5: a schematic diagram of a method for manufacturing a sheet metal element having a cured composite structure is shown in another embodiment.
Fig. 6: a schematic view of a sheet metal element having a cured composite structure according to another embodiment of the present invention is shown.
Detailed Description
In order that the advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It should be noted that these embodiments are merely representative embodiments of the present invention, and the specific methods, devices, conditions, materials, etc. are not meant to limit the present invention or the corresponding embodiments. The devices are shown for expressing relative positions and are not drawn to actual scale.
Referring to fig. 1A, 1B and 1C, fig. 1A is a schematic view of a sheet metal substrate according to an embodiment of the invention. FIG. 1B is a schematic diagram of a sheet metal element having a cured composite structure according to an embodiment of the invention. FIG. 1C is an enlarged schematic view of the region A according to the embodiment of FIG. 1B. As shown in fig. 1A, 1B and 1C, a sheet metal element 1 having a cured composite structure includes a sheet metal substrate 10 and a cured composite structure 12. The sheet metal substrate 10 has a first surface 102, the first surface 102 having a trench structure 104. The cured composite structure 12, which is attached within the trench structure 104, further comprises a metal powder and a cured polymer 125. The metal powder comprises a plurality of metal particles 121. The cured polymer 125 is dispersed and encapsulated between the metal particles 121.
Wherein, because the polymer 125 has adhesive property, the relative position of the metal particles 121 can be stabilized by adding the polymer 125. In addition, the polymer 125 fills gaps between the metal particles 121 of the metal powder, surrounds, encapsulates and protects the metal particles, so that the metal particles 121 are not easily oxidized and deteriorated. The slurry containing the polymer 125 and the metal powder is dried to form the cured composite structure 12, which is attached to the sheet metal substrate 10 by the polymer 125 to avoid flow, slip, and spillage. The cured polymer is not in a fixed shape, and may be in the form of a net, a block, or a bar, such as to fill the interstices between the metal particles 121. And there may also be gaps 127 between the polymers.
Further, the polymer 125 in the sheet metal element of the present invention can help form the cured composite structure 12 attached to the sheet metal substrate 10 to form a capillary structure semi-finished pre-cast of the isopipe element. The manufacturing plant of the temperature equalizing plate element only needs to further heat the sheet metal element with a solidified composite material structure, so that the polymer is cracked and removed, and the metal powder is not sintered, thus forming a porous capillary structure in the groove of the metal sheet, and being beneficial to batch operation in mass production. The metal particles 121 and the polymer 125 of the cured composite structure 12 adhere to each other to form a continuous structure, and in the embodiment used to make the thin-type isopipe element, the sheet metal substrate 10 of the sheet metal structure has a thickness of less than 1.0mm, and the cured composite structure has a thickness of less than 0.5mm.
The aforementioned cured composite structure 12 is further described. Referring to fig. 2, fig. 2 is a cross-sectional view of a sheet metal element 1 having a cured composite structure according to another embodiment of the invention. As shown in fig. 2, the cured composite structure 12 includes, in addition to the aforementioned metal powder, metal particles 121, and further includes a metal oxide powder including a plurality of metal oxide particles 123. The cured composite structure 12 is formed from a slurry containing metal particles 121, metal oxide particles 123, polymer 125, and an organic solvent, through a drying step. The organic solvent can increase the fluidity of the slurry to be easily disposed on the first surface 102 of the sheet metal substrate 10, and then upon a heated bake, the solvent is removed to form the cured composite structure 12. One benefit of the polymer 125 is that the polymer 125 is cleaved off after heating, forming gaps between the metal particles 121 and the metal oxide particles 123 . When the sheet metal element having the cured composite structure is further processed, the polymer 125 in the cured composite structure 12 is heated to crack and remove, leaving only the voids of the metal particles 121 and the metal oxide particles 123 between each other.
In one embodiment, the metal powder has an average particle size (D50) of less than 53 microns (53 um) and the metal oxide powder has an average particle size (D50) of less than 5 microns (5 um). The total weight of the metal particles 121 and the metal oxide particles 123 is greater than the total weight of the polymer, and the weight ratio is between 3 and 10. In addition, the metal particles 121 are spheroidal copper particles, and the metal oxide particles 123 are octahedral cuprous oxide (Cu 2 O). The metal particles 121, metal oxide particles 123 and polymer 125 are uniformly distributed to form the cured composite structure 12 and are adhered in the trench structure 104 of the sheet metal substrate 10.
In a specific embodiment, the metal oxide particles 123 may be reduced to copper via sintering in a nitrogen-hydrogen environment. Wherein the metal oxide particles 123 comprise a plurality of cuprous oxide (Cu 2 O) particles and at least one of a plurality of copper oxide (CuO) particles. The difference is the temperature required for the reduction sintering in a hydrogen-containing atmosphere, copper oxide (CuO requires sintering at higher temperatures to form a porous capillary structure with the metal particles in the preferred embodiment, oxygen in the cured composite structure 12The cuprous oxide powder is particles with an octahedral crystal structure, and starts to reduce at two tips of the crystal to form copper (Cu) when the particles are sintered at high temperature in a nitrogen-hydrogen mixed atmosphere, and then the particles are reduced and stretched to form a chain-shaped copper component. When polymer 125 is cleaved to remove, the voids left facilitate the stretching of the cuprous oxide crystals into a chain-like metallic copper structure and sintering with metallic particles 121 as the copper is reduced to copper. Thus, when the cuprous oxide particles and copper particles in the cured composite structure 12 in the trench structure 104 of the sheet metal element are sintered together in a nitrogen-hydrogen mixed atmosphere, the chain-like copper members and the spheroidal copper members are joined and stacked to form a three-dimensional porous capillary structure.
The metal particles 121 may include at least one of a plurality of copper (Cu) particles and a plurality of copper alloy (Cu alloy) particles.
Wherein the polymer 125 comprises a plurality of plastic polymer members and a plurality of synthetic fiber members. Wherein the plastic polymer material is polymethyl methacrylate material, and the synthetic fiber material is polyamide fiber material. Polymethyl methacrylate material is also known as acrylic, and has a boiling point of about 200 degrees celsius. Polyamide fibers are also known as nylon. At temperatures below the melting point of the metal, the polymer will first crack. Pores remain in place after cleavage. Such pores facilitate sintering of copper particles and cuprous oxide particles under nitrogen-hydrogen mixture to form a good porous capillary structure.
The cured composite structure 12 is disposed on the sheet metal substrate 10 by disposing a slurry comprising a chemical solvent on the first surface 102 of the sheet metal substrate 10 and baking the slurry to form the cured composite structure 12. The arrangement may be steel plate printing or screen printing or dispensing or coating, so that the slurry can be evenly distributed in the groove structure 104 of the sheet metal substrate 10. When the sheet metal element containing the cured composite structure 12 is heated, the polymer in the cured composite structure 12 is capable of fixedly adhering to the first surface 102 of the sheet metal substrate 10 after curing. In one embodiment, the drying step is performed in a drying environment for 10-60 minutes at a temperature between 90-110 degrees celsius. The temperature can remove organic solvent, and the heating and drying mode can be common hot air heating or infrared heating.
Referring to fig. 3, fig. 3 is a schematic diagram of a cured composite structure according to the embodiment of fig. 2 after sintering. The sheet metal element with the cured composite structure of the present invention, after heating, wherein the polymer 125 in the cured composite structure 12 is cleaved and removed, leaving the metal particles 121 and the metal oxide particles 123 and pores, is then sintered in a hydrogen-containing atmosphere, and the metal oxide particles are gradually reduced while forming the chain-like metallic copper member 2 due to the nature of its crystal structure. On the other hand, metal particles such as copper particles further form a spheroidal metallic copper member 3, and the chain metallic copper member 2 and the spheroidal metallic copper member 3 are stacked alternately to form a three-dimensional porous capillary structure 4. The pore density and size of the sintered capillary structure can be adjusted according to the mixing ratio of polymer, metal particles and metal oxide particles in the cured composite structure 12 of the sheet metal element.
In detail, the polymer in the cured composite structure is cleaved and removed when the sheet metal element is heated, leaving copper particles and cuprous oxide particles (or copper oxide particles). Next, a higher temperature sintering process is performed in a hydrogen-containing atmosphere, and the cuprous oxide particles undergo reduction and diffusion reactions to form chain-like copper members which sinter with each other and with the spheroidal copper particles, thereby forming a three-dimensional porous capillary structure 4.
Referring to fig. 4, fig. 4 is a flowchart illustrating a method for manufacturing a sheet metal element having a cured composite structure according to an embodiment of the invention. As shown in fig. 4, the method for manufacturing a sheet metal element with a cured composite structure according to this embodiment includes the following steps: step S1: providing a sheet metal substrate with a groove structure; step S2: providing a slurry, wherein the slurry is mixed with a plurality of metal particles, a plurality of metal oxide particles, a polymer and an organic solvent; step S3: paving slurry in the groove structure; step S4: heating and baking the slurry to volatilize the organic solvent, andthe metal particles, metal oxide particles and polymer are cured to form a cured composite structure that is attached to the sheet metal substrate in the channel structure for subsequent storage or production operations. Wherein the metal particles may comprise at least one of copper (Cu) particles and copper alloy (Cu alloy) particles, and the metal oxide particles may be copper oxide (CuO) particles or/and cuprous oxide (Cu) 2 O) particles. Wherein the organic solvent may be an alcohol solvent.
In one embodiment, the step S4 drying step is performed in a drying environment for 10-60 minutes at a temperature between 90-110 ℃.
Step S4: and (3) volatilizing the organic solvent in the slurry during heating and baking to form a cured composite material structure. Referring again to fig. 3, after step S4 of the present invention, the cured composite structure of the present invention may be further continuously warmed. During the heating process, the polymer in the cured composite structure is cleaved and removed. Further heating in hydrogen-containing atmosphere, the copper oxide particles are reduced and diffused into a chain-like copper member, and the copper particles or copper alloy particles form a sphere-like copper member. The chain-like copper members and the sphere-like copper members are sintered with each other to form a capillary structure with a porous structure. The size of the spheroidal copper members is generally larger than the diameter of the chain-shaped copper members, so that the spheroidal copper members which are alternately distributed among the chain-shaped copper members can be formed, and the capillary force of the porous metal capillary structure can be effectively improved.
Referring to fig. 5, fig. 5 is a schematic diagram showing a method for manufacturing a sheet metal element 1 having a cured composite structure according to another embodiment. Firstly, providing a sheet metal substrate 10 with a groove structure 104, which is roughly divided into a first region 5 and a second region 6; next, a first slurry 141 and a second slurry 142 are provided, each of the first slurry 141 and the second slurry 142 having mixed metal particles 121, metal oxide particles 123, a polymer 125, and an organic solvent. The first slurry 141 and the second slurry 142 are different in the mixing quantity ratio of the metal particles 121 and the metal oxide particles 123 or in the size of the particle diameter. Finally, the first slurry 141 and the second slurry 142 are heated and baked to volatilize the organic solvent. After volatilization, the metal particles 121, metal oxide particles 123, and polymer 125 in the first slurry 141 and the second slurry 142 solidify to form a continuous structure that is attached to the trench structure 104 of the first surface 102 of the sheet metal substrate 10. The first paste 141 forms the first sub-structure 131. The second paste 142 forms the second sub-structure 132. The first type of secondary structure 131 and the second type of secondary structure 132 are continuously joined to form the cured composite structure 12. And, the first type sub-structure 131 is located in the first region 5, and the second type sub-structure 132 is located in the second region 6. The first zone 5 acts as the heat absorption zone of the temperature equalization plate and the second zone 6 comprises the condensation zone of the temperature equalization plate.
In detail, therefore, the cured composite structure includes a first type of sub-structure 131 and a second type of sub-structure 132, the first type of sub-structure 131 and the second type of sub-structure 132 being continuous. In one embodiment, the first average particle size of the metal particles of the first type of sub-structure 131 is greater than 25um, the second average particle size of the metal particles of the second type of sub-structure 132 is less than 25um, and the first average particle size is greater than the second average particle size. The metal powder components of the first type secondary structure 131 and the second type secondary structure 132 are the same, and both the metal powder components comprise metal particles and metal oxide particles, wherein the difference is that the mixing quantity ratio and the particle size of the metal particles and the metal oxide particles are different.
In addition, the first region 5 and the second region 6 of the sheet metal substrate 10 are supported in different manners. Referring to fig. 6, fig. 6 is a schematic view of a sheet metal member 1 having a cured composite structure according to another embodiment of the invention. As shown in fig. 6, the first region 5 of the sheet metal substrate 10 of the sheet metal element 1 of the present invention further comprises a plurality of columnar support structures 1041, and the second region 6 further comprises elongated support structure walls 1043 formed in the trenches. The elongated support structure walls 1043 are elongated structures extending from one end of the second region 6 to the other end. Wherein the columnar support structure 1041 can diffuse the gaseous working fluid, and the elongated support structure walls 1043 can help the flow velocity of the liquid working fluid in the capillary structure, thereby achieving the effect of rapid heat conduction
Referring to fig. 5 and 6 again, in one embodiment, the heat absorbing region of the first region 5 of the sheet metal element corresponds to the first type of sub-structure 131 laid by the cured composite structure. Similarly, the non-heat absorbing regions of the second region 6 of the sheet metal element of the present invention correspond to the secondary structure 132 of the second type laid up by the cured composite structure. Wherein, the average particle size of the metal particles of the first type secondary structure 131 of the cured composite structure of the present invention is larger than that of the metal particles of the second type secondary structure 132, and the average number of the metal particles of the first type secondary structure 131 is smaller than that of the metal particles of the second type secondary structure 132. When the cured composite structure is further subjected to subsequent sintering, the metal particles of the first type of secondary structure 131 form a first capillary structure via sintering, and the metal particles of the second type of secondary structure 132 form a second capillary structure via sintering. The capillary holes in the first capillary structure are larger than the capillary holes in the second capillary structure. The efficiency of the temperature equalizing plate is that two different capillary structures generate different vertical gasification capacity and horizontal liquid conveying capacity, which improves the efficiency of liquid phase and gas phase circulation of working fluid in the thin temperature equalizing plate, thereby achieving the rapid heat dissipation effect.
In summary, the present invention provides a sheet metal component having a cured composite structure and a method of making the same, wherein the polymer protects the metal particles and connects them to each other, and the cured composite structure adheres to the sheet metal substrate to prevent flow. During practical manufacturing, the method can effectively save the possibility of batch production and avoid oxidation, deterioration and overflow of metal particles, thereby achieving automatic operation and improving production efficiency. And the polymer on the sheet metal element can be easily burned off in the subsequent process sintering.
The foregoing detailed description of the preferred embodiments is intended to more clearly describe the features and spirit of the invention, but is not intended to limit the scope of the invention by way of the preferred embodiments disclosed above. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims. The scope of the invention as claimed should therefore be accorded the broadest interpretation based upon the foregoing description so as to encompass all such modifications and equivalent arrangements.
Claims (8)
1. A sheet metal element with a solidified composite material structure is applied to manufacturing a temperature equalizing plate element and a capillary structure thereof, and is characterized by comprising the following components:
a sheet metal substrate having a first surface with a trench structure; and
a cured composite structure, attached within the trench structure, further comprising:
a metal powder comprising a plurality of metal particles;
a metal oxide powder comprising a plurality of metal oxide particles interspersed between the metal particles, the metal oxide particles comprising at least one of a plurality of copper oxide particles and a plurality of cuprous oxide particles; and
a polymer dispersed among the metal particles and coating at least a part of the surfaces of the metal particles;
wherein the metal particles and the polymers of the cured composite material adhere to each other to form a continuous structure, and the metal oxide particles are used for reduction stretching into a chain-like metal copper member upon sintering.
2. A sheet metal element having a cured composite structure as defined in claim 1, wherein: the polymer is used for cracking and removing when heating to form gaps among the metal particles, and the metal powder is used for forming a porous capillary structure when sintering.
3. A sheet metal element having a cured composite structure as defined in claim 1, wherein: the metal particles include at least one of a plurality of copper particles and a plurality of copper alloy particles.
4. A sheet metal element having a cured composite structure as defined in claim 1, wherein: the cuprous oxide particles are octagonal cubic crystals with an average particle size (D50) of less than 5 microns.
5. A sheet metal element having a cured composite structure as defined in claim 1, wherein: the polymers comprise a plurality of plastic polymer materials and a plurality of synthetic fiber materials.
6. A sheet metal element having a cured composite structure as defined in claim 5, wherein: the plastic polymer materials are polymethyl methacrylate materials, and the synthetic fiber materials are polyamide fiber materials.
7. A method of making a sheet metal component having a cured composite structure, comprising the steps of:
providing a sheet metal substrate with a groove structure;
providing a slurry, wherein the slurry is mixed with a metal powder, a metal oxide powder, a polymer and an organic solvent, the metal oxide powder comprises a plurality of metal oxide particles, the metal oxide particles comprise at least one of a plurality of copper oxide particles and a plurality of cuprous oxide particles, and the metal oxide particles are used for being reduced and stretched into a chain-shaped metal copper component during sintering;
laying the slurry in the groove structure;
heating and baking the slurry to volatilize the organic solvent, and curing the metal powder, the metal oxide powder and the polymer to form a cured composite structure which is adhered in the groove structure of the sheet metal substrate.
8. A method of making a sheet metal component having a cured composite structure as defined in claim 7, wherein: the polymer powder is used for cracking and removing when heating, so that gaps are formed between the particles of the metal powder and the particles of the metal oxide powder, and the metal powder and the metal oxide powder form a porous capillary structure after sintering under the atmosphere containing hydrogen.
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